From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sat, 14 Jul 2001 02:03:23 +0000 (+0000)
Subject: implemented RefreshItem(s) under MSW
X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/a7f560a2cb7f512c8fe3a9f6ff501c551e9e8941

implemented RefreshItem(s) under MSW


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11032 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---

diff --git a/include/wx/msw/listctrl.h b/include/wx/msw/listctrl.h
index b4b1597388..14140398c3 100644
--- a/include/wx/msw/listctrl.h
+++ b/include/wx/msw/listctrl.h
@@ -231,6 +231,10 @@ public:
     // returns true if it is a virtual list control
     bool IsVirtual() const { return (GetWindowStyle() & wxLC_VIRTUAL) != 0; }
 
+    // refresh items selectively (only useful for virtual list controls)
+    void RefreshItem(long item);
+    void RefreshItems(long itemFrom, long itemTo);
+
     // Operations
     ////////////////////////////////////////////////////////////////////////////
 
diff --git a/src/msw/listctrl.cpp b/src/msw/listctrl.cpp
index ddc46eb6d3..107623555b 100644
--- a/src/msw/listctrl.cpp
+++ b/src/msw/listctrl.cpp
@@ -1683,6 +1683,14 @@ WXLPARAM wxListCtrl::OnCustomDraw(WXLPARAM lParam)
         case CDDS_ITEMPREPAINT:
             {
                 size_t item = (size_t)nmcd.dwItemSpec;
+                if ( item >= (size_t)GetItemCount() )
+                {
+                    // we get this message with item == 0 for an empty control,
+                    // we must ignore it as calling OnGetItemAttr() would be
+                    // wrong
+                    return CDRF_DODEFAULT;
+                }
+
                 wxListItemAttr *attr =
                     IsVirtual() ? OnGetItemAttr(item)
                                 : (wxListItemAttr *)m_attrs.Get(item);
@@ -1850,6 +1858,22 @@ void wxListCtrl::SetItemCount(long count)
     }
 }
 
+void wxListCtrl::RefreshItem(long item)
+{
+    if ( !ListView_Update(GetHwnd(), item) )
+    {
+        wxLogLastError(_T("ListView_Update"));
+    }
+}
+
+void wxListCtrl::RefreshItems(long itemFrom, long itemTo)
+{
+    for ( long item = itemFrom; item <= itemTo; item++ )
+    {
+        RefreshItem(item);
+    }
+}
+
 // ----------------------------------------------------------------------------
 // wxListItem
 // ----------------------------------------------------------------------------